Heat oil in a large skillet over medium high heat. Add red peppers, red onion, pineapple, and garlic. Saute until just softened.Remove from heat and let cool.

Lay tortillas on work surface. Top each with about 35 grams cheese, 35 grams vegetables, and about 48 grams steak. Roll up and place, seam side down, on a baking sheet that has been coated with nonstick cooking spray.

Spray the taquitos with more nonstick cooking spray. Bake in a preheated 400 degree oven for 10 minutes, turning the taquitos over halfway through cooking.